The U.S. Navy will issue new directives requiring ship commanders operating in congested seas to broadcast their ships' locations in an effort to avoid collisions, according to a report that aired on National Public Radio on Friday. That's a significant change from the norm. To maintain proper operational security known as OPSEC, the Navy typically doesn't advertise ship movements. A spate of collisions at sea has top Navy brass reconsidering that protocol. <related> According to the NPR report, Navy ships will be changing the way they employ the Automatic Identification System, which commercial vessels use as a tool to help avoid crashes. Retired Vice Adm. William Douglas Crowder, a former commander of the U.S. Seventh Fleet and a former deputy chief of naval operations, told NPR that Navy ships typically use AIS in receive-only mode, which allows them to see other vessel...